Apparatus For Precision Volumetric Metering And Distribution Of Solid Inputs Used In Agriculture

ABSTRACT

An apparatus  100  is described for precision volumetric metering and distribution of solid inputs used in agriculture, the apparatus being coupled to sowing devices and comprising a frame  1  with a through-hole  12  through which an axle  3  radially locked to a turbine  4  extends, the axle  3  driving the metering turbine  4 ; an opening  21  in the floor of the frame leads the agricultural input  31  to the output nozzle  13 . The geometry of the turbine  4  comprises cutouts of various shapes which form chambers  5  for distributing the agricultural input  31  uniformly. A labyrinth  25  is formed by the frame  1 , the inner grater  6  and the turbine  4 . The structural geometry of the turbine  4  only allows metering of the input  31  while the turbine is rotating, while the agricultural input  31  is retained inside and on the turbine  4  when the turbine does not rotate.

FIELD OF THE INVENTION

The present invention belongs to the field of the apparatuses for volumetric metering and distribution of agricultural solid inputs, more specifically, mineral or chemical fertilizers, soil acidity regulators and seeds, such apparatuses being mounted on agricultural machines including planter-fertilizers, seeder-fertilizers and soil acidity regulator dispensers.

Background of the Invention

Apparatuses for distribution and volumetric metering of mineral and chemical fertilizers, soil acidity regulators and seeds are meant to distribute and meter such agricultural solid inputs during the operations of agricultural machinery upon distribution of soil regulators, mineral and chemical fertilizers metering and seed planting.

Generally speaking, such state-of-the-art devices perform weight metering measurements by applied surface, metering according to the needs of a certain area as defined by the farmer.

It is well-known that the formulation of agricultural solid inputs such as mineral and chemical fertilizers exhibits varied specific weights resulting from the varied chemical compositions of such inputs.

In order to meet the agronomic needs regarding the correct soil regulation and fertilization, mineral and chemical fertilizers are formulated in accordance with each specific application as well as the needs of each farmer. Each formulation can alter, differentiate and change its specific weight, the farmer being unable to meter the correct agricultural input volume in view of the higher or lesser difficulty in adjusting the present metering systems.

Further, the above mentioned specific weight variations, resulting from the different formulations of agricultural solid inputs, combined to the present dispenser systems which do not enable efficient metering, can lead to irregular application of such inputs to the soil. Other drawbacks are the generation of uncontrolled distribution of said agricultural solid inputs during apparatus shutdown and during operations on inclined soils with frontal and side hills and slopes as well as in operations on rough grounds with brisk moves of machinery during planting and metering of mineral and chemical fertilizers.

No matter which kind of metering system is used, with or without level regulator, because the structural geometry of such metering appliances includes an endless screw, such agricultural input metering appliances do not secure accurate metering volumetry. This causes uncontrolled distribution whenever the operation of planting machinery is performed on rough soils, with great moves and impacts on the machinery as well as during operations in hills and slopes' soils, be them either side or frontal soils, as well as during machinery shutdowns.

During planting operations in hills the state-of-the-art mineral and chemical fertilizers dispensers do not meter in the required amounts, being frequently unworkable in steep hills; while during planting in slopes, such systems enable a higher-than-required metering since they are devoid of any outlet flow control mechanism through the upper or lower agricultural dispenser screw.

Also during shutdowns at the planting rows ends, such systems expel a certain amount of agricultural solid inputs due to the same reason explained above, that is, those are devoid of any system avoiding the involuntary fall of agricultural solid inputs located at the extreme end of the metering apparatus screw.

It is also known that the present mineral and chemical fertilizers dispensers, through endless, parallel or conic, free or enclosed screws, with or without flow regulator, with or without level regulator, cause pulses of mineral and chemical fertilizers whenever the agricultural machinery to which they are attached is performing planting operations.

Such pulses are generated by the transporting screw end that drives a higher amount of agricultural input at the rotation step at which such end is in upper position relative to the ground, directing a higher amount of agricultural input at each turn of said screw. Such effect is still more accentuated for machinery provided with a level regulator.

These variations in input amount at each screw turn are at the origin of said pulses, or gulps, implying in irregular application of agricultural solid inputs. The said irregular application is characterized by distribution a higher amount of agricultural solid inputs in one segment of the groove or planting row and a lower amount of said agricultural input in another segment. Variations in application, inefficient and irregular, entail and cause many drawbacks to plant development.

At the planting row segments which received higher amounts of agricultural input absorption of same by the plant is hindered by the excessive amount of these nutrients, besides resulting in soil salinization. On the other hand, for the planting row segments where metering was lower than required, as defined by the farmer, the plant will not develop satisfactorily in view of lack of nutrients.

Consequent to all the irregular metering situations, because of specific weight variations and difficulty for adjustment and control of state-of-the-art metering devices, combined to the uncontrolled metering with metering pulses, physical-chemical drawbacks to the soil are created. Such drawbacks imply in increased costs for the farmer and reduce crop productivity by the lack of control of volume and weight of the applied agricultural solid inputs.

The patent literature discloses several documents related to mineral and chemical fertilizers dispensers, several of these documents being related to planters and seeders/fertilizers.

It can be seen that in general the objects of the said patent documents are directed to improvements in screw feeders such as the Brazilian Utility Model patent MU6602114 which relates to an improvement in the body of a screw feeder.

This same object is also presented by Brazilian Utility Model document MU 8400771-0, highlighting an alleged improvement in functionality at the body of the screw feeder.

Brazilian patent document BR9603264-2 teaches a rotating drum metering system having external grooves, the drum being utilized for seed application. Directed to the same functionality is Brazilian patent document BR 0803497-4 A2. Both documents BR 9603264-2 A and BR 0803497-4 A2 relate to the same function of seed distribution but have different distinguishing features.

Brazilian patent document BR 0400933-9 A relates to a screw dispenser having a side outlet, being constituted of a side level regulator, said outlet having been devised to lessen the pulse or gulp drawbacks caused by the screw feeder system. The scrutiny of such state-of-the-art documents demonstrates that the screw metering system is by definition deficient and implies in metering drawbacks during field operation. It should be pointed out that in spite of the solution suggested by the above document, the side level regulator keeps the solid input inside the dispenser device, while the input build-up keeps on generating pulses and gulps, no matter the level regulator has a side or frontal outlet relative to the screw.

Although all of the cited documents relate to mineral and chemical fertilizers dispensers, all differ from the invention presented in the present Application since the apparatus which is the object of the invention comprises a distribution and metering centrifugal turbine provided with metering chambers, its nature being therefore distinguished from any state-of-the-art document referred to above in the present specification. In a non-suggested and non-described manner, either in separate or combined state-of-the-art documents, the apparatus object of the present Application is endowed with the function of when in rotational movement being able of accurately establishing the agricultural solid inputs metering and when static, being closed and shut. Such function is completely absent from any state-of-the-art document.

Therefore, it would be highly useful for the technique and the agriculture in general terms to make available an accurate system for mineral and chemical fertilizers metering to be employed in planters/fertilizers, seeders/fertilizers and fertilizers dispensers, aiming at the regularity of metering both in slopes and frontal and side hills to the planting rows and which in operation keeps the metering volumetrically regular without any pulses and variations and without involuntary fall of agricultural solid input during shutdowns or at the travel stop of the planting row.

SUMMARY OF THE INVENTION

Broadly the apparatus for metering and volumetric distribution of solid agricultural solid inputs to be employed in planting machinery including planters/fertilizers, seeders and soil acidity regulators machinery according to the invention comprises:

-   -   a) a supporting hollow housing, designed for containing such         agricultural solid inputs, the upper section of same being flat         for connection with the planting machinery while the lower         section is of cylindrical shape in coincidence with a         distribution metering centrifugal turbine, said frame being         provided with a through-hole for traversing an axle radially         locking said turbine, a bearing being mounted on said housing,         the floor of said frame being provided with an outlet opening to         convey the solid agricultural input up to an output nozzle         towards the soil;     -   b) a centrifugal turbine for distribution and metering of said         solid agricultural inputs, the turbine being accommodated within         said supporting housing, the body of said turbine being shaped         into a non-hollow section and a hollow chambers section or         metering chambers of identical volumetric and geometric sizes,         the non-hollow section delimiting said chambers so that when one         chamber is coincident with the agricultural solid input outlet         opening of said frame the agricultural solid input is expelled         towards the soil, while the agricultural solid input which is         out of the chamber which is coincident with the said outlet         opening will be retained in the adjacent chambers, the metering         volume being pre-determined by the constructive geometry of said         chambers, the solid agricultural inputs being displaced and         conveyed through successive chambers under continuous cycling of         same towards the lower section of said turbine, the said turbine         performing metering only when under rotational movement;     -   c) in the lower section of said metering turbine and internally         to it, a grater travel stop, attached to a cover and positioned         in the inner side of the centrifugal turbine for withdrawal of         the agricultural solid input which is out of the chambers of         said turbine and designed to create, together with the main         housing, a passage labyrinth, so as to gauge or calibrate the         volumetric amount of the agricultural solid input and         consequently the weight, acting as shutter and closing system         for the outlet opening of said frame when the turbine is in the         inertial or static state so that in the absence of rotational         movement the agricultural solid input will be retained inside         said labyrinth, within the turbine and on said turbine;     -   d) a driving axle radially locked relative to said turbine,         mounted on bearings at both ends, with one external bearing         mounted on the frame and another bearing attached to said cover,         said axle being provided with roller bearings attached to said         supporting frame and said cover; said axle being mounted         transversally and through the frame and said cover, and being         cooperative with said centrifugal turbine so that said         centrifugal turbine is cooperative with the driving axle; and         where said axle receives a rotational force straight from the         planting machinery kinematic system, developing a turbine         controlled rotational movement which associated to the regular         geometrical figures of the chambers results always in the same         volume among the centrifugal turbine chambers, promoting         metering regularity and agricultural solid inputs homogeneity         and consequent absence of variable pulses or gulfs; and     -   e) a discharge system, comprising an output nozzle for         connection with a conveying pipe for conveying the agricultural         solid input up to the soil, the inner section of said nozzle         having the shape of the solid agricultural input to be metered,         that is, a rectangle, a lozenge, a square, a circle or any         geometric shape coincident with the apparatus's outlet opening.

Once the solid agricultural input is expelled by one of the chambers of the lower section of said metering turbine, the subsequent chamber is able to convey further metering material, and after this further material is expelled the said chamber will be empty again and ready to receive a fresh portion of material do be metered. In this way there is established a constant cycling which entails a regular, accurate, continuous and uniform volumetric distribution of the solid agricultural inputs to be metered, without any pulses and volume variations.

The function of the metering distribution centrifugal turbine of the apparatus of the invention is to transfer the solid agricultural input from the upper section of the apparatus, where it is stored, and up to the lower section of same, where the discharge or output nozzle is positioned, this in turn being connected to a conveying pipe for the solid agricultural inputs to be metered and up to the soil. The conveying pipe is a state-of-the-art device and as such is not an object of the invention.

The chambers of said turbine centrifuge, in combination with said grater and the so-formed labyrinth, gauging the volumetric amount of the solid agricultural input and consequently its weight, working as shutter and closure system when in the inertial or static state.

The said turbine, when operating in rotational movement, that is, when it is working, enables the passage of said solid agricultural inputs throughout said chambers, called metering chambers, of which the structural geometry is mentioned above in the present specification, and having homogeneous sizes, selected among rectangles, lozenges, squares, circles or several other shapes as required, so as to meet all the geometries, weights and volumes required for the metering operation in the field of the several kinds of solid agricultural inputs to be metered.

It is within the purposes of the invention to provide that the axle and centrifugal turbine actuation system enabling the volumetric and accurate metering of solid agricultural inputs including any other products required for the metering and planting of seeds in the soil have as constructive feature all the possible ways of assembling. Thus, the said centrifugal turbine coupling is performed either transversally or perpendicularly to the solid agricultural input container, according to the needs of the device where it will be employed.

Advantageously, in an alternative embodiment of the invention, the compact structural geometry of the present apparatus also enables the direct assembling of same to the planting row, over the seeds dispenser system or over the soil cut line. This embodiment and assembling option is designed for the application of powdery mineral, chemical and biological fertilizers, biological regulators combined to seeds, these powder inputs being of fine granulometric size and low amount to be applied in weight and volume by hectare during the planting operation.

The actuation of the distribution and volumetric metering apparatus for mineral and chemical fertilizers, soil acidity regulators and seeds according to the invention mounted on the planting row or soil cut line is obtained through the agricultural machinery kinematic system.

Whenever mounted directly on the planting line and on the seeds distribution system, or even on the soil cut line, the distribution and volumetric metering apparatus for mineral and chemical fertilizers, soil acidity regulators and seeds according to the invention may be coupled to smaller containers for the distribution of specific products to be laid on the soil in small amounts.

Further, the compact shape and on the basis of the through-axle of the present apparatus, a tandem apparatus, side by side assembly is made possible, the more than one unit assembly being employed either on the planting line or on the soil cut line or still straight on the mineral and chemical fertilizers container.

The apparatus of the invention provides an actuating axle and cooperating with it the said distribution metering centrifugal turbine for distribution and metering of solid agricultural inputs. The structural geometry of said axle is either massive or having a hollow center of square, hexagonal, round or any other possible geometric form, in agreement with the requirements of the axle transmission.

The metering of solid agricultural inputs to be performed by the said distribution turbine is obtained with the aid of chambers which constitute said turbine and which possess identical volumetric and geometrical sizes, their shapes being helicoids, rectangular, squared, round or any shape required for the desired end and for the specific solid agricultural inputs and their respective volumes to be metered.

The metering volume is pre-determined by the constructive geometry of the chambers, since their sizes are strictly the same and geometrically regular so as to secure that the metering of said solid agricultural inputs occurs continuously and at constant weight and volume.

The centrifuge system of the distribution metering turbine was developed having the feature of working both in the vertical and the horizontal position, since the metering system of the present volumetric distribution metering apparatus for solid agricultural inputs useful for planters/fertilizers, seeders and soil acidity regulators devices is based and guaranteed by said centrifugal turbine.

The Applicant, faced to the poor features of the structural geometry of the present distribution apparatuses for solid agricultural inputs, which all present the serious drawback of being devoid of closing and shuttering systems when in a static state, and consequently do not secure the accurate volumes or weights of said solid agricultural inputs caused by the variation in specific weights of same, has developed the apparatus which is the object of the invention. It is the aim of the present apparatus to secure the accurate volume and weight to be dispensed under constant regularity along the planting row.

As mentioned above in the present specification, the drawback of the state-of-the-art metering systems lies in the fact that such systems do not bear any outlet shutter system, such as a valve, able to actuate when in a static state.

The main feature of the present invention is thus the constant, accurate and controlled volumetric distribution of solid agricultural inputs to be metered during the course of planting with the aid of said distribution metering centrifugal turbine coupled to the actuating axle. Said axle comprises shapes which can vary from circular, hexagonal, oval, square, rectangular or any other geometric shape required by the device to which it is to be assembled.

According to the invention, all of the transportation movement of the solid agricultural input to be metered occurs in a centrifugal and regular way, since the actuating axle of the present distribution apparatus receives a rotational force straight from the planting machinery kinematic system, developing a controlled movement that, combined with the chambers' regular geometric shapes results in the same volume being obtained by the centrifugal turbine chambers. This brings high efficiency to the metering system by the regularity of metering that is free from variable pulses or gulfs.

The invention provides a labyrinth formed by the distribution metering centrifugal turbine, by the inner grater travel stop and by the frame which limits and exactly sets the volume and weight of the solid agricultural input in liters per rotation or liters by hectare of the product to be metered. The inner grater travel stop is attached to a cover and is positioned in the inner side of the centrifugal turbine, so as to withdraw excess of products and solid agricultural inputs to be metered, securing the volumetry as defined by the metering chamber.

The shape of said inner grater travel stop is adjusted to each different kind of agronomic need of metering and distribution of mineral and chemical fertilizers, soil acidity regulators and seeds, as required.

Besides, in a static state the distribution metering centrifugal turbine has the task of aiding in the closure of the outlet opening, in this way avoiding both the involuntary spilling of solid agricultural input and the generation of pulses of the same, which aids in reducing inputs waste or loss.

As structuring element of the present apparatus a supporting frame is provided for supporting all of the components of the metering and distribution device for mineral and chemical fertilizers, soil acidity regulators and seeds.

The said supporting frame comprises varied shapes and can be manufactured from different materials, being provided with distinct bore positions to be connected to several kinds of containers. The supporting frame can be connected to all kinds of agricultural machinery, including planters/fertilizers, seeders/fertilizers, state-of-the-art mineral and chemical fertilizers metering devices, being useful both for the original machinery market, that is, new machinery, as well as for the second-hand and refurbished machinery.

For the seed distribution the geometry of the turbine hollow chambers is pre-determined by the variables of the cultivars, which comprise soya beans, corn, wheat, rice, sorghum, canola, pasture seeds and all of the plants which make up the primary agribusiness production chain.

The invention provides an actuating axle mounted on roller bearings, those in turn being mounted on the supporting frame and cover, said axle being installed transversally and piercing the said frame and cover. Said bearings are mounted (attached) on the cover and on the frame with the aid of any fixation means. Alternatively, they can be integrated to said cover or to said frame by manufacture.

The structural geometry of the present apparatus enables the assembly of several distribution devices in series, side-by-side, for the distribution of several different kinds of solid agricultural inputs.

According to the transversal embodiment of the invention, the axle actuation system and metering distribution centrifugal turbine are provided so that the turbine rotation is in the same direction as the agricultural machinery displacement, that is, the turbine rotates in the same direction as the agricultural machinery wheels.

On the contrary, in the perpendicular embodiment of the apparatus of the invention the turbine also rotates perpendicularly relative to the agricultural machinery displacement direction.

The invention provides a control system for the flow rate fine tuning by the system rotational variation based on the agricultural machinery to which the distribution system is coupled, since said rotational movement, combined with the metering chambers, grater and labyrinth and the outlet opening enables a regular metering frequency at the lower section of the distribution device which is placed before the output nozzle and conveying pipe which conveys products and agricultural inputs to be metered up to the soil.

This is a further advantageous aspect of the invention, since in state-of-the-art devices in spite of the fact that flow rate is also regulated by rotational variation, screws of different pitches must be changed and flow reduction agents must be added, such procedures being completely absent when it is made use of the inventive apparatus (100).

Said flow rate fine tuning can be augmented or reduced until complete closure, according to the need of adjustment for better volumetric distribution of mineral and chemical fertilizers, soil acidity regulators and seeds, especially seeds known as of fine grain.

The invention can be altered further without altering the scope of its inventive concept in order to adapt itself to the different models of planters/fertilizers, seeders/fertilizers, kinds and versions of metering devices for mineral and chemical fertilizers and soil acidity regulators as well as all seeds existing in the market and for all kinds of plantation required by the farmer.

Advantageously, in the inventive apparatus, the rotational movement of the centrifugal turbine enables crushing of soil lumps and homogenization of the agricultural solid inputs, strongly minimizing or making it nearly impossible the occurrence of soil compaction besides securing that all of the material within said turbine is delivered in a continuous and regular way so as to avoid both build-ups and losses, without metering pulses.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 depicts a frontal orthogonal view of the assembled device for the accurate metering and volumetric distribution of agricultural solid inputs according to the invention.

FIG. 2 depicts an orthogonal view of the right side of the same apparatus of FIG. 1.

FIG. 3 depicts an orthogonal view of the rear of the same apparatus of FIG. 1.

FIG. 4 depicts an orthogonal view of the left side of the same apparatus of FIG. 1.

FIG. 5 depicts a right upper view in perspective of the same apparatus of FIG. 1.

FIG. 6 depicts a left upper view in perspective of the same apparatus of FIG. 1.

FIG. 7 depicts an orthogonal view of the lower section of the same apparatus of FIG. 1.

FIG. 8 depicts an orthogonal view of the upper section of the same apparatus of FIG. 1.

FIG. 9 is an exploded view of the same apparatus of FIG. 1, depicting a preferred embodiment of the invention.

FIG. 10 is a perspective view of the metering distribution turbine with various kind of axes and chambers of the apparatus of the invention.

FIG. 11 is a cut view representing the working principle of the apparatus of the invention.

FIG. 12 is a cut view representing the working principle of the labyrinth of the apparatus of the invention.

FIG. 13 represents an exploded view of the apparatus of the invention picturing another preferred embodiment of same.

FIG. 14 is a right upper view of the apparatus of the invention with lateral actuation.

DETAILED DESCRIPTION OF THE INVENTION

The invention will be described below by reference to the attached Figures, which should not be construed as limiting same.

As of FIG. 1, the present apparatus is generally represented by numeral 100. Generally the two distinct preferred embodiments of the invention are represented by FIGS. 9 and 13 as exploded views.

FIG. 9 is the most preferred mode of the invention, the actuation being by the through-axle. This mode is preferably directed to new devices built in agreement with the concept of the present invention.

On the other hand FIG. 13 depicts the embodiment with lateral-perpendicular actuation. This mode is directed to providing the inventive apparatus to the replacement market of existing plantation machinery. Such agricultural planting machinery makes use of lateral-perpendicular actuation.

According to the invention, the expression “solid agricultural inputs” or simply “solid inputs” refer to mineral and chemical fertilizers, soil acidity regulators and seeds.

Generally speaking, frame 1 is a hollow part the upper section of it being flat for connection with the planting machinery (not represented) while the lower section is of cylindrical shape in coincidence with a metering centrifugal turbine 4.

frame 1 is provided with a) a through-hole 12 to traverse an axle 3 radially blocked to the turbine 4 by key 19, axle 3 being aimed at driving said metering turbine 4; and b) outlet opening 21 (FIG. 9) at the floor of said frame 1 to convey the agricultural input 31 up to the output nozzle 13. Further, frame 1 lodges a bearing 7. A cover 2 houses an inner grater 6 and a bearing 7 a, all elements being traversed by axle 3.

The geometry of turbine 4 comprises a non-hollow section 32 and a hollow section, the hollow section being provided with cutouts of several shapes, forming metering chambers 5 which uniformly distribute the solid agricultural input 31.

The metering chambers 5 of turbine 4 convey the agricultural input 31 throughout labyrinth 25 formed by frame 1, inner grater 6 and turbine 4, the agricultural input 31 being expelled through output nozzle 13. The non-hollow section of turbine 4 limits said chambers 5 so that when one chamber 5 is coincident with the opening 21 of said frame 1 the agricultural input 31 will be expelled towards the soil, while the agricultural input 31 which is outside of said chamber 5, and is not coincident with said opening 21 will be retained in the adjacent chamber 5. The foregoing description depicts the shutter process as performed by the apparatus 100 of the invention. It should be noted that such principle is a distinguishing feature of the apparatus 100 of the invention, and is not to be found in any state-of-the-art document.

The apparatus of the invention for the accurate metering and volumetric distribution of agricultural solid inputs and generally designed by numeral 100 (FIG. 1) comprises as structuring element frame 1 for supporting all of the elements of the system, said frame 1 being provided with flange 22 and holes 14 for attachment of apparatus 100 to the planting and metering machinery of agricultural inputs (not represented).

The side section of said frame 1 bears a through-hole 12 designed for the passage of axle 3. A closing cover 2 makes one side of a rectangle at the upper section of frame 1, the other three sides of the said rectangle being formed by flange 22. Frame 1 is generally a portion of the present apparatus 100, it being similar to other state-of-the-art frames or housings.

Cover 2 comprises an upper section constituted by a horizontal plate and hole 14 for connection with the agricultural machinery (not represented) and a lower section as a semi-circle provided with a through-hole 11 for axle 3, and engages bearing 7 a and roller bearings 8 with blocking rings 9, said cover 2 being connected to frame 1 with the aid of fixation means 15 and 17. See FIGS. 9 and 13.

Axle 3 traverses roller bearing 8, hole 11 of cover 2, through-hole 12 of frame 1 as well as the radial center of turbine 4. Axle 3 is radially locked to turbine 4 with the aid of key 19.

The inner grater 6 is attached to cover 2 and withdraws excess material which fills chambers 5. This enables the accurate volumetric metering of the agricultural input while turbine 4 is in a state of movement.

On the other hand, in a static state said grater 6 works as the system shutter, hindering the involuntary exit of agricultural input 31 throughout the volumetric opening outlet 21 which leads up to the output nozzle 13.

The geometric shapes of the said metering chambers 5 of said distribution metering centrifugal turbine 4 (FIG. 10) are variable, being helicoids 5, rectangle 5 a, circle 5 b, square 5 c or even any other geometric shape as required by the different uses and needs to perform the metering and distribution functions of the said agricultural solid inputs 31.

As regards axle 3, it admits several constructive concepts such as solid 10 a, hexagonal through-hole 10 b, square through-hole 10 c, internal or external attachment threads 10 d, or any other formats as required by special purposes (see FIG. 10).

The kinematic movement created by the agricultural machinery is conveyed to said actuating through-axle 3 locked at said distribution metering centrifugal turbine 4 with the aid of ends of 10 a, 10 b, 10 c, 10 d. The kinematic movement is conveyed to the volumetric distribution apparatus 100 of the invention by means of square, hexagonal, chains, gear couplings or any other actuating means designed for driving the rotation of centrifugal turbine 4.

In operation, turbine 4 receives the solid agricultural input 31 to be metered, and conveys same throughout the metering chambers 5 up to the lower section 24 of frame 1, the excess of solid agricultural input 31 being withdrawn by the inner travel stop grater 6. This enables turbine 4 with its metering chambers 5 to convey solid agricultural inputs 31 throughout labyrinth 25 formed by frame 1, travel stop grater 6 and turbine 4, the solid agricultural input 31 being expelled through opening 21 up to the output nozzle 13. The shuttering process is as described above in the present specification. See FIG. 12.

Therefore, the centrifugal turbine 4 in combination with the inner side of frame 1 and the outer side of the travel stop grater 6 forms labyrinth 25 and performs, with the aid of the non-hollow section 32 of turbine 4 the shuttering and closing function of involuntary or non-programmed exit of solid agricultural input 31, through the opening of outlet 21 of frame 1 up to the output nozzle 13 when in a static state.

The receiving format of said output nozzle 13 reproduces the geometry which is coincident with that of frame 1 outlet 21. At the outlet of the solid agricultural inputs 31 to be metered, the geometric shape of nozzle 13 can be adapted for coupling of sleeves, hoses or telescopic pipes (non-represented) of the agricultural machinery and designed for conveying said solid agricultural inputs 31 to be metered up to the soil.

When in operation, the upper section 23 of frame 1 of the present apparatus 100 takes the solid agricultural inputs 31 to be metered, filling up chambers 5 with same volumes and conveying said solid agricultural input 31 throughout labyrinth 25 up to the outlet opening 21.

The rotation movement of turbine 4 does not allow volumetric variations of metering because the constructive and working geometry of same performs metering solely when under rotational movement, that is, in the absence of rotational movement the solid agricultural input 31 will be kept within and on said turbine 4. In this way there is no involuntary or non-programmed metering since the system formed by turbine 4, inner grater 6 and frame 1, besides forming labyrinth 25 is in charge of shuttering and closing the outlet opening 21, because of the positioning of these components relative to said outlet opening 21.

This unique and patentably distinguishing feature of the invention, that is, of continuous and regular metering during the rotation movement of the distribution metering centrifugal turbine 4 and of closure of outlet 21 of solid agricultural inputs 31 when the said turbine 4 is in a static state, advantageously enables the system to work at constant, regular metering during operations in inclined ground, both in ascending and descending angles, towards right or left side, and performing the accurate and regular metering without volume and weight variations throughout the planting row, that is, without pulses in the metering. Such feature is not to be suggested nor found in state-of-the-art documents.

The guarantee of fine tune in volume and weight of solid agricultural input 31 to be metered is controlled and defined by the variation in slewing rotation of the distribution metering turbine 4, distribution with flow reducers, since the apparatus is previously calibrated and the only required adjustment is the rotation adjustment as a function of the need of each plantation.

The concept of the invention comprises further creating a turbulence of said solid agricultural inputs 31 within said centrifugal turbine 4 which by centrifugal force avoids the build-up of agricultural inputs 31 at the center of said turbine 4, cycling the particles of same for filling up the metering chambers 5 and conveying said particles throughout labyrinth 25 to be expelled through opening outlet 21 towards the output nozzle 13 up to the soil.

Further, the rotation movement of the centrifugal turbine 4 leads to crushing of soil lumps and homogenization of solid agricultural inputs 31 rendering compaction very difficult or nearly impossible and securing that all the material within said turbine 4 is continuously and regularly dispensed, avoiding build-ups and losses, without metering pulses.

The assembling and connection of apparatus 100 of the invention for the accurate volumetric distribution for metering of mineral and chemical fertilizers, soil acidity regulators and seeds to the agricultural machinery for planting is performed through flange 22 and attachment holes 14 which enable the coupling of the apparatus 100 to the container boxes of this machinery or still directly at the planting row on the seeds distribution system or still on the soil cut line.

In the embodiment of the invention with perpendicular side actuation (see FIGS. 13 and 14) of the apparatus 100 for accurate volumetric distribution for metering of mineral and chemical fertilizers, soil acidity regulators and seeds 31, a support 28 for conical gears 26, 27 is added, said support 28 being mounted on bearing 7 a of cover 2 and attached by screws 20 and nuts 18.

The perpendicular side of support 28 accommodates the conical gear 26 mounted on roller bearings 29 attached to support 28 through fixation ring 30, the conical gear 26 being engaged on axle 3 thus forming the set of perpendicular lateral actuation of apparatus 100. See FIG. 13 and FIG. 14. 

1. An apparatus for the accurate metering and volumetric distribution for solid agricultural inputs as applied to planting machinery, said apparatus being characterized by comprising: a supporting, hollow frame 1, for housing said solid agricultural inputs 31 the upper section of said frame 1 being flat for connection via flange 22 with the planting machinery while the lower section is of cylindrical shape in coincidence with a metering centrifugal turbine 4, said frame 1 being provided with a through-hole 12 designed for traversing an axle 3 locked radially to said turbine 4, the floor of said frame 1 being provided with an outlet opening 21 for conveying said solid agricultural input 31 up to an output nozzle 13 towards the soil; a centrifugal turbine 4 for distribution and metering said solid agricultural inputs 31, the turbine 4 being accommodated within said supporting frame 1, the body of said turbine 4 being shaped into a non-hollow section 32 and a hollow chambers section or metering chambers 5 of identical volumetric and geometric sizes, the non-hollow section 32 delimiting said chambers 5 so that when one chamber is coincident with the agricultural solid input 31 outlet opening 21 of said frame 1 the agricultural solid input 31 is expelled towards the soil, while the agricultural solid input 31 which is out of the chamber 5 which is coincident with the said outlet opening 21 will be retained in the adjacent chambers 5, the metering volume being pre-determined by the structural geometry of said chambers 5, the solid agricultural inputs 31 being displaced and conveyed through successive chambers 5 under continuous cycling of same towards the lower section of said turbine 4; in the lower section of said metering turbine 4 and internally to it, a grater travel stop 6, attached to a cover 2 and positioned in the inner side of the centrifugal turbine 4 for withdrawal of the agricultural solid input 31 which is out of the chambers 5 of said turbine 4 and designed to create, together with frame 1, a passage labyrinth 25, so as to gauge or calibrate the volumetric amount of the agricultural solid input 31 and consequently the weight, acting as shutter and closing system for the outlet opening 21 of said frame 1 when the turbine 4 is in the inertial or static state so that in the absence of rotational movement the agricultural solid input will be retained inside said labyrinth 25, within the turbine 4 and on said turbine 4; a driving axle 3 radially locked relative to said turbine 4, mounted on bearings 7 at both ends, with one external bearing 7 mounted on the frame 1 and another bearing 7 a attached to said cover 2, said axle 3 being provided with roller bearings 8 attached to said supporting frame 1 and said cover 2; said axle 3 being mounted transversally and through the frame 1 and said cover 2 and being cooperative with said centrifugal turbine 4 so that said centrifugal turbine 4 is cooperative with the driving axle 3; and where said axle 3 receives a rotational force straight from the planting machinery kinematic system, developing a turbine controlled rotational movement which associated to the regular geometrical figures of the chambers 5 results always in the same volume among the centrifugal turbine chambers 5, promoting metering regularity and agricultural solid inputs 31 homogeneity and consequent absence of variable pulses or gulfs; and a discharge system, comprising an output nozzle 13 for connection with a conveying pipe for conveying the agricultural solid input 31 up to the soil, the inner section of said nozzle 13 having the shape of the solid agricultural input 31 to be metered, that is, a rectangle, a lozenge, a square, a circle or any geometric shape coincident with the apparatus's outlet opening
 21. 2. The apparatus according to claim 1, characterized in that the cover 2 comprises an upper section comprising a horizontal plate provided with hole 14 for connection with the planting machinery and a lower, semi-circle section provided with a through-hole 11 for the passage of axle 3, said cover 2 engaging a bearing 7 a and roller bearings 8 provided with a locking ring 9, said cover 2 being attached to frame 1 through fixation means 15 and
 17. 3. The apparatus according to claim 1, characterized in that axle 3 traverses roller bearing 8, hole 11 of cover 2, hole 12 of frame 1 and the radial center of turbine 4 to be radially locked to same with the aid of key
 19. 4. The apparatus according to claim 1, characterized in that the geometrical shapes of metering chambers 5 of said metering distribution centrifugal turbine 4 are selected among helicoids 5, rectangles 5 a, circles 5 b and squares 5 c.
 5. The apparatus according to claim 1, characterized in that axle 3 comprises constructive concepts such as massive 10 a, hexagonal through-hole 10 b, square through-hole 10 c or internal or external attachment threads 10 d.
 6. The apparatus according to claim 1, characterized in that in operation, turbine 4 receives the solid agricultural input 31 to be metered, and conveys same throughout the metering chambers 5 up to the lower section 24 of frame 1, the excess of solid agricultural input 31 being withdrawn by the internal travel stop grater 6, enabling said turbine 4 with its metering chambers 5 to convey said solid agricultural inputs 31 throughout labyrinth 25 formed by frame 1, travel stop grater 6 and turbine 4, the solid agricultural input 31 being expelled through opening 21 of frame 1 up to the output nozzle
 13. 7. The apparatus according to claim 1, characterized in that the metering of the solid agricultural input 31 through the turbine 4 rotation movement is effected solely when said turbine 4 is under rotational movement, while in the absence of rotational movement said solid agricultural input 31 is retained within and on the said turbine
 4. 8. The apparatus according to claim 1, characterized in that for said apparatus to be actuated according to the perpendicular lateral mode, support 28 for conical gears 26, 27 is added, said support 28 being mounted on bearing 7 a of cover 2 and attached by screws 20 and nuts
 18. 9. The apparatus according to claim 8, characterized in that the perpendicular side of support 28 accommodates the conical gear 26 mounted on rollers bearings 29 attached to support 28 through fixation ring 30, the conical gear 26 being engaged on axle 3 thus forming the set of perpendicular lateral actuation of said apparatus
 100. 10. The apparatus according to claim 1, characterized in that alternatively bearings 7, 7 a are manufactured integrated respectively either to said supporting frame 1 or to said cover
 2. 